I agree with the guys, spend a few extra bucks and get ones that are ceramic coated, Commonly called Jet Hot coated, but there are various brands out there.
Chrome not only discolors, it rusts. Black will need repainted in time. The headers on my '27 were coated 17 years ago and still have no rust and are presentable.
BTW, I have two sets of Sanderson headers on my cars, Dan has a set on his '29 too. They are a perfect fit every time, and the welds look great. For some reason, Don bought Patriot headers from Speedway for his T. They were no cheaper, but the quality is nowhere like Sandersons. We spent an hour yesterday with a die grinder making the holes line up with the holes in the heads. We actually had to egg shape some of them to get them to even bolt on. He is going to run them for a while and then switch to Sandersons.
Don